/Engine/Source/Editor/UnrealEd/Public/PackageHelperFunctions.h
Sets the contents of a Tag or Collection to be the InAssetList. Assets not mentioned in the list will be untagged.
template<class AssetSetPolicy> bool AssignSetContent ( [FName](API\Runtime\Core\UObject\FName) InSetName, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) InType, const [TArray](API\Runtime\Core\Containers\TArray)< [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) > & InAssetList )